| Parameter |
Value |
| Designation |
C/1932 P1 (Peltier-Whipple) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
1932-09-01T20:28:52.584960Z |
| Orbit solution date (soln_date, UTC) |
2023-12-04T20:32:29Z |
| Obs used |
56 |
| NEO |
- |
| M1 |
8.100 |
| K1 |
38.250 |
| PC |
- |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
1932-08-31.0000000 |
| e |
0.97689337 |
| q (au) |
1.037233 |
| a (au) |
44.888968 |
| i (deg) |
71.723285 |
| Ω (om, deg) |
345.466351 |
| ω (w, deg) |
38.467110 |
| M (ma, deg) |
359.993926 |
Magnitude
Scatter + Global Linear
$$
M_a = (7.490 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
7.490 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-0.500 |
| k |
1.000 |
| δ90 |
10.000 |
| Parameter |
Symbol |
Range |
Description |
| Absolute magnitude at 1 AU from Sun and Earth |
H0 |
-5 to 20 |
Intrinsic brightness of the comet |
| Photometric slope parameter |
n |
2 to 6 |
Rate of brightness change with heliocentric distance |
| Forward scattering asymmetry factor |
gf |
0.8 to 1 |
Degree of forward scattering |
| Backward scattering asymmetry factor |
gb |
-1 to -0.5 |
Degree of backward scattering |
| Partitioning coefficient |
k |
0.8 to 1 |
Ratio between forward/backward scattering contributions |
| Dust-to-gas brightness ratio |
δ90 |
1 to 10 |
Relative contribution of dust scattering to gas emission |
Reference: EPSC-DPS2025-160
Ephemeris
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-07-29 00:00 |
10:53:19.33 |
-28:16:58.3 |
HIP 53221 |
6.08 |
| 2026-07-29 12:00 |
10:53:20.54 |
-28:16:56.9 |
HIP 53221 |
6.20 |
| 2026-07-30 00:00 |
10:53:21.77 |
-28:16:55.5 |
HIP 53221 |
6.33 |
| 2026-07-30 12:00 |
10:53:23.01 |
-28:16:54.3 |
HIP 53221 |
6.47 |
| 2026-07-31 00:00 |
10:53:24.25 |
-28:16:53.2 |
HIP 53221 |
6.62 |
| 2026-07-31 12:00 |
10:53:25.49 |
-28:16:52.2 |
HIP 53221 |
6.77 |
| 2026-08-01 00:00 |
10:53:26.75 |
-28:16:51.3 |
HIP 53221 |
6.93 |
| 2026-08-01 12:00 |
10:53:28.01 |
-28:16:50.6 |
HIP 53221 |
7.10 |
| 2026-08-02 00:00 |
10:53:29.28 |
-28:16:49.9 |
HIP 53221 |
7.27 |
| 2026-08-02 12:00 |
10:53:30.55 |
-28:16:49.4 |
HIP 53221 |
7.45 |
| 2026-08-03 00:00 |
10:53:31.83 |
-28:16:49.0 |
HIP 53221 |
7.63 |
| 2026-08-03 12:00 |
10:53:33.12 |
-28:16:48.7 |
HIP 53221 |
7.82 |
| 2026-08-04 00:00 |
10:53:34.42 |
-28:16:48.6 |
HIP 53221 |
8.01 |
| 2026-08-04 12:00 |
10:53:35.72 |
-28:16:48.5 |
HIP 53221 |
8.21 |
| 2026-08-05 00:00 |
10:53:37.03 |
-28:16:48.6 |
HIP 53221 |
8.42 |
| 2026-08-05 12:00 |
10:53:38.34 |
-28:16:48.8 |
HIP 53221 |
8.63 |
| 2026-08-06 00:00 |
10:53:39.66 |
-28:16:49.1 |
HIP 53221 |
8.84 |
| 2026-08-06 12:00 |
10:53:40.98 |
-28:16:49.5 |
HIP 53221 |
9.06 |
| 2026-08-07 00:00 |
10:53:42.32 |
-28:16:50.1 |
HIP 53221 |
9.28 |
| 2026-08-07 12:00 |
10:53:43.65 |
-28:16:50.7 |
HIP 53221 |
9.50 |
| 2026-08-08 00:00 |
10:53:45.00 |
-28:16:51.5 |
HIP 53221 |
9.73 |
| 2026-08-08 12:00 |
10:53:46.35 |
-28:16:52.4 |
HIP 53221 |
9.96 |
| 2026-08-09 00:00 |
10:53:47.70 |
-28:16:53.5 |
HIP 53221 |
10.20 |
| 2026-08-09 12:00 |
10:53:49.06 |
-28:16:54.6 |
HIP 53221 |
10.43 |
| 2026-08-10 00:00 |
10:53:50.43 |
-28:16:55.9 |
HIP 53221 |
10.67 |
| 2026-08-10 12:00 |
10:53:51.80 |
-28:16:57.3 |
HIP 53221 |
10.92 |
| 2026-08-11 00:00 |
10:53:53.17 |
-28:16:58.8 |
HIP 53221 |
11.16 |
| 2026-08-11 12:00 |
10:53:54.55 |
-28:17:00.4 |
HIP 53221 |
11.41 |
| 2026-08-12 00:00 |
10:53:55.94 |
-28:17:02.1 |
HIP 53221 |
11.67 |
| 2026-08-12 12:00 |
10:53:57.33 |
-28:17:04.0 |
HIP 53221 |
11.92 |
| 2026-08-13 00:00 |
10:53:58.73 |
-28:17:06.0 |
HIP 53221 |
12.18 |
| 2026-08-13 12:00 |
10:54:00.13 |
-28:17:08.1 |
HIP 53221 |
12.44 |
| 2026-08-14 00:00 |
10:54:01.53 |
-28:17:10.3 |
HIP 53221 |
12.70 |
| 2026-08-14 12:00 |
10:54:02.94 |
-28:17:12.6 |
HIP 53221 |
12.96 |
| 2026-08-15 00:00 |
10:54:04.36 |
-28:17:15.1 |
HIP 53221 |
13.23 |
| 2026-08-15 12:00 |
10:54:05.78 |
-28:17:17.7 |
HIP 53221 |
13.50 |
| 2026-08-16 00:00 |
10:54:07.20 |
-28:17:20.4 |
HIP 53221 |
13.77 |
| 2026-08-16 12:00 |
10:54:08.62 |
-28:17:23.2 |
HIP 53221 |
14.04 |
| 2026-08-17 00:00 |
10:54:10.06 |
-28:17:26.1 |
HIP 53221 |
14.32 |
| 2026-08-17 12:00 |
10:54:11.49 |
-28:17:29.1 |
HIP 53221 |
14.59 |
| 2026-08-18 00:00 |
10:54:12.93 |
-28:17:32.3 |
HIP 53221 |
14.87 |
| 2026-08-18 12:00 |
10:54:14.37 |
-28:17:35.6 |
HIP 53221 |
15.15 |
| 2026-08-19 00:00 |
10:54:15.82 |
-28:17:39.0 |
HIP 53221 |
15.43 |